<!DOCTYPE html>
<html lang="ru-RU">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <title>Руководство по тестированию Vue приложений (Vue.js 2)</title>
    <meta name="description" content="">
    <link rel="icon" href="https://lmiller1990.github.io/vue-testing-handbook/img/favicon.png">
  <meta property="og:title" content="Vue Testing Handbook">
  <meta property="og:description" content="Vue testing handbook">
  <meta property="og:type" content="website">
  <meta property="og:url" content="https://lmiller1990.github.io/vue-testing-handbook/">
  <meta property="og:image" content="https://lmiller1990.github.io/vue-testing-handbook/img/og.png">
    
    <link rel="preload" href="/vue-testing-handbook/assets/css/0.styles.99f2ca3b.css" as="style"><link rel="preload" href="/vue-testing-handbook/assets/js/app.14051834.js" as="script"><link rel="preload" href="/vue-testing-handbook/assets/js/3.119a321e.js" as="script"><link rel="preload" href="/vue-testing-handbook/assets/js/2.94957ecd.js" as="script"><link rel="preload" href="/vue-testing-handbook/assets/js/63.e1723f7e.js" as="script"><link rel="prefetch" href="/vue-testing-handbook/assets/js/10.7b1750c8.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/100.87c02eb0.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/101.9f86f8af.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/102.7cf5b3b5.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/103.9a447cc0.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/104.d960f455.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/105.42aa8c19.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/106.fa067e24.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/107.f6145328.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/108.4251a9d9.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/109.6e04b4aa.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/11.c9a15d65.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/110.203be49f.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/111.e66d4c1a.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/112.d5cf2637.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/113.0e1df8ea.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/114.b1d0a5f5.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/115.d21ab6a2.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/116.e13d34ff.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/117.532bedf9.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/118.b99c8d4d.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/119.97666be8.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/12.8ec4d737.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/120.e5fbc47b.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/121.2d6cedde.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/122.7dc3c3fc.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/123.82fcb804.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/124.affd46d3.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/125.10d1ddcb.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/126.8ca1978a.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/127.7b76e158.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/128.e0d8fdce.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/129.e861e49f.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/13.96ee585a.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/130.474092c4.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/131.71e4509c.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/132.b48fe96d.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/133.9268758a.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/134.6a042ef6.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/135.6df261f9.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/136.8aab4165.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/137.60d15690.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/138.29f827fd.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/139.e8db710e.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/14.522b77b9.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/140.8a3b2b26.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/141.cd5f96df.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/142.04a47072.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/143.ac0cb5e1.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/144.c69a73ac.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/15.2f00de2d.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/16.d120a376.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/17.9260e267.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/18.4e3a9d5e.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/19.bfe7cfa3.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/20.52828530.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/21.4d92035b.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/22.49a88bda.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/23.79de1f16.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/24.f45f108e.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/25.48371e8a.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/26.bc7a5470.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/27.49bfeced.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/28.b697055e.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/29.0ef469da.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/30.bd209efe.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/31.ddf8aa10.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/32.95ec3267.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/33.52cf0ebc.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/34.73b1ca03.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/35.be79f171.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/36.52a4dcd2.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/37.a02e83c0.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/38.2a809ae1.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/39.31de0194.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/4.a86536d1.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/40.4a3cfcb7.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/41.db485265.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/42.8c4375ac.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/43.2f241bb5.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/44.43539973.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/45.619b76a6.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/46.00e17cc1.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/47.faf51fac.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/48.840de9e5.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/49.3410da74.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/5.d3ebdf21.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/50.647913c0.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/51.4990b428.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/52.85ff4209.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/53.7bbf915a.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/54.1fc8316d.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/55.374436d3.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/56.40ebbbe6.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/57.40d9cc46.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/58.37ab0bcf.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/59.8df2efac.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/6.637082cf.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/60.326b4bdd.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/61.449fcfe0.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/62.f05ac3d6.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/64.5b9e17ef.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/65.52e8ce24.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/66.cbdf653b.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/67.522e5bfd.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/68.1c27735b.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/69.1f5624e9.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/7.43089f9d.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/70.49fd6b50.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/71.20acc429.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/72.715f4620.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/73.ac123d7d.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/74.59a869d0.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/75.772485ad.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/76.b887e73a.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/77.70e54ee3.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/78.2306c3e7.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/79.e01a6cd1.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/8.4c4cdaa7.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/80.c12fc82f.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/81.44ef90b7.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/82.ff3143a2.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/83.22084435.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/84.485c66f4.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/85.d8afef97.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/86.2ba55e96.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/87.d5642266.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/88.3ad1f8ac.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/89.e370d2fc.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/9.a0f31be6.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/90.2c039dfb.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/91.2c1dd586.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/92.571cd8ae.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/93.b88ae6f6.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/94.16000348.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/95.79a96428.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/96.c86f8cad.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/97.bc1d6c91.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/98.34c6a547.js"><link rel="prefetch" href="/vue-testing-handbook/assets/js/99.e1174558.js">
    <link rel="stylesheet" href="/vue-testing-handbook/assets/css/0.styles.99f2ca3b.css">
  </head>
  <body>
    <div id="app" data-server-rendered="true"><div class="theme-container"><header class="navbar"><div class="sidebar-button"><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" role="img" viewBox="0 0 448 512" class="icon"><path fill="currentColor" d="M436 124H12c-6.627 0-12-5.373-12-12V80c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12z"></path></svg></div> <a href="/vue-testing-handbook/ru/" class="home-link router-link-active"><!----> <span class="site-name">Руководство по тестированию Vue приложений (Vue.js 2)</span></a> <div class="links"><div class="search-box"><input aria-label="Search" autocomplete="off" spellcheck="false" value=""> <!----></div> <nav class="nav-links can-hide"><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="Select language" class="dropdown-title"><span class="title">Переводы</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/vue-testing-handbook/setting-up-for-tdd.html" class="nav-link">English</a></li><li class="dropdown-item"><!----> <a href="/vue-testing-handbook/v3/setting-up-for-tdd.html" class="nav-link">v3</a></li><li class="dropdown-item"><!----> <a href="/vue-testing-handbook/ja/setting-up-for-tdd.html" class="nav-link">日本語</a></li><li class="dropdown-item"><!----> <a href="/vue-testing-handbook/ru/setting-up-for-tdd.html" class="nav-link router-link-exact-active router-link-active">Русский (Vue.js 2)</a></li><li class="dropdown-item"><!----> <a href="/vue-testing-handbook/v3/ru/setting-up-for-tdd.html" class="nav-link">Русский (Vue.js 3)</a></li><li class="dropdown-item"><!----> <a href="/vue-testing-handbook/zh-CN/setting-up-for-tdd.html" class="nav-link">简体中文</a></li><li class="dropdown-item"><!----> <a href="/vue-testing-handbook/ko/setting-up-for-tdd.html" class="nav-link">한국어</a></li></ul></div></div> <a href="https://github.com/lmiller1990/vue-testing-handbook" target="_blank" rel="noopener noreferrer" class="repo-link">
    GitHub
    <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></nav></div></header> <div class="sidebar-mask"></div> <aside class="sidebar"><a href="https://vuejs-course.com/" target="_blank"><img id="ad" src="https://raw.githubusercontent.com/lmiller1990/vue-testing-handbook/master/src/.vuepress/public/composition.png" alt="vuejs-course banner"></a> <br> <div class="info"><small>
    Hi! Get $10 off my
    <a href="https://vuejs-course.com/" target="_blank">new</a> <a href="https://vuejs-course.com/" target="_blank">course</a> <a href="https://vuejs-course.com/" target="_blank">on</a> <a href="https://vuejs-course.com/" target="_blank">Vue.js 3</a>,
    <a href="https://vuejs-course.com/" target="_blank">TypeScript and</a>,
    <a href="https://vuejs-course.com/" target="_blank">testing</a>,
    with the discount code VUEJS_COURSE_10_OFF.
    </small></div> <nav class="nav-links"><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="Select language" class="dropdown-title"><span class="title">Переводы</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/vue-testing-handbook/setting-up-for-tdd.html" class="nav-link">English</a></li><li class="dropdown-item"><!----> <a href="/vue-testing-handbook/v3/setting-up-for-tdd.html" class="nav-link">v3</a></li><li class="dropdown-item"><!----> <a href="/vue-testing-handbook/ja/setting-up-for-tdd.html" class="nav-link">日本語</a></li><li class="dropdown-item"><!----> <a href="/vue-testing-handbook/ru/setting-up-for-tdd.html" class="nav-link router-link-exact-active router-link-active">Русский (Vue.js 2)</a></li><li class="dropdown-item"><!----> <a href="/vue-testing-handbook/v3/ru/setting-up-for-tdd.html" class="nav-link">Русский (Vue.js 3)</a></li><li class="dropdown-item"><!----> <a href="/vue-testing-handbook/zh-CN/setting-up-for-tdd.html" class="nav-link">简体中文</a></li><li class="dropdown-item"><!----> <a href="/vue-testing-handbook/ko/setting-up-for-tdd.html" class="nav-link">한국어</a></li></ul></div></div> <a href="https://github.com/lmiller1990/vue-testing-handbook" target="_blank" rel="noopener noreferrer" class="repo-link">
    GitHub
    <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></nav>  <ul class="sidebar-links"><li><a href="/vue-testing-handbook/ru/" class="sidebar-link">Введение</a></li><li><a href="/vue-testing-handbook/ru/setting-up-for-tdd.html" class="active sidebar-link">Подготовка к TDD</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a href="/vue-testing-handbook/ru/setting-up-for-tdd.html#установка-vue-cli" class="sidebar-link">Установка vue-cli</a></li><li class="sidebar-sub-header"><a href="/vue-testing-handbook/ru/setting-up-for-tdd.html#пишем-первый-тест" class="sidebar-link">Пишем первый тест</a></li><li class="sidebar-sub-header"><a href="/vue-testing-handbook/ru/setting-up-for-tdd.html#создаём-компонент-greeting" class="sidebar-link">Создаём компонент Greeting</a></li><li class="sidebar-sub-header"><a href="/vue-testing-handbook/ru/setting-up-for-tdd.html#написание-теста" class="sidebar-link">Написание теста</a></li><li class="sidebar-sub-header"><a href="/vue-testing-handbook/ru/setting-up-for-tdd.html#запускаем-тест" class="sidebar-link">Запускаем тест</a></li><li class="sidebar-sub-header"><a href="/vue-testing-handbook/ru/setting-up-for-tdd.html#добавnение-проверки" class="sidebar-link">Добавление проверки</a></li></ul></li><li><a href="/vue-testing-handbook/ru/rendering-a-component.html" class="sidebar-link">Отрисовка компонентов</a></li><li><a href="/vue-testing-handbook/ru/components-with-props.html" class="sidebar-link">Тестирование входных параметров</a></li><li><a href="/vue-testing-handbook/ru/computed-properties.html" class="sidebar-link">Вычисляемые свойства</a></li><li><a href="/vue-testing-handbook/ru/simulating-user-input.html" class="sidebar-link">Симулирование пользовательского ввода</a></li><li><a href="/vue-testing-handbook/ru/testing-emitted-events.html" class="sidebar-link">Тестирование пользовательских событий</a></li><li><a href="/vue-testing-handbook/ru/mocking-global-objects.html" class="sidebar-link">Мокаем глобальные объекты</a></li><li><a href="/vue-testing-handbook/ru/stubbing-components.html" class="sidebar-link">Заглушки для компонентов</a></li><li><a href="/vue-testing-handbook/ru/finding-elements-and-components.html" class="sidebar-link">Поиск элементов и компонентов</a></li><li><a href="/vue-testing-handbook/ru/testing-vuex.html" class="sidebar-link">Тестирование Vuex</a></li><li><a href="/vue-testing-handbook/ru/vuex-mutations.html" class="sidebar-link">Vuex - Мутации</a></li><li><a href="/vue-testing-handbook/ru/vuex-actions.html" class="sidebar-link">Vuex - Действия</a></li><li><a href="/vue-testing-handbook/ru/vuex-getters.html" class="sidebar-link">Vuex - Геттеры</a></li><li><a href="/vue-testing-handbook/ru/vuex-in-components.html" class="sidebar-link">Vuex в компонентах - $state и геттеры</a></li><li><a href="/vue-testing-handbook/ru/vuex-in-components-mutations-and-actions.html" class="sidebar-link">Vuex в компонентах - мутации и действия</a></li><li><a href="/vue-testing-handbook/ru/vue-router.html" class="sidebar-link">Vue Router</a></li><li><a href="/vue-testing-handbook/ru/composition-api.html" class="sidebar-link">Composition API</a></li><li><a href="/vue-testing-handbook/ru/reducing-boilerplate-in-tests.html" class="sidebar-link">Уменьшаем шаблонный код</a></li><li><a href="/vue-testing-handbook/ru/jest-mocking-modules.html" class="sidebar-link">Jest - мокаем модули</a></li></ul> </aside> <main class="page"> <div class="theme-default-content content__default"><div class="custom-block tip"><p class="custom-block-title">Это руководство было написано для Vue.js 2 и Vue Test Utils v1.</p> <p>Версия для Vue.js 3 <a href="/v3/ru">здесь</a>.</p></div> <h2 id="установка-vue-cli"><a href="#установка-vue-cli" class="header-anchor">#</a> Установка vue-cli</h2> <p><code>vue-test-utils</code> – официальная библиотека для тестирования vue компонентов. Она работает как в браузере, так и в среде Node.js, позволяет работать в связке с любым тест-ранером. Мы будем запускать тесты через Node.js.</p> <p><code>vue-cli</code> – самый простой способ начать работу. Он установит всё необходимое для проекта, сконфигурирует Jest – популярный фреймворк для тестирования. Установим cli, написав в консоли:</p> <div class="language-bash extra-class"><pre class="language-bash"><code><span class="token function">yarn</span> global <span class="token function">add</span> @vue/cli
</code></pre></div><p>или через npm:</p> <div class="language-bash extra-class"><pre class="language-bash"><code><span class="token function">npm</span> <span class="token function">install</span> -g @vue/cli
</code></pre></div><p>Создадим новый проект, написав <code>vue create [project-name]</code>. Выберем &quot;Manually select features&quot; и для &quot;Unit Testing&quot; указываем Jest.</p> <p>Как только установка закончится, переходим в проект через <code>cd</code> и запускаем <code>yarn test:unit</code>. Если всё сделано правильно, вы увидите:</p> <div class="language-bash extra-class"><pre class="language-bash"><code> PASS  tests/unit/example.spec.js
  HelloWorld.vue
    ✓ renders props.msg when passed <span class="token punctuation">(</span>14ms<span class="token punctuation">)</span>

Test Suites: <span class="token number">1</span> passed, <span class="token number">1</span> total
Tests:       <span class="token number">1</span> passed, <span class="token number">1</span> total
Snapshots:   <span class="token number">0</span> total
Time:        <span class="token number">1</span>.79s
</code></pre></div><p>Поздравляю, вы только что запустили свой первый тест!</p> <h2 id="пишем-первый-тест"><a href="#пишем-первый-тест" class="header-anchor">#</a> Пишем первый тест</h2> <p>Мы запускали тест, который установился вместе с проектом. Теперь давайте напишем собственный компонент и тест к нему. По традиции, когда работают с TDD, вы сначала пишите тесты, которые падают, а затем пишите код, который позволит тестам пройти проверку. Для начала, создадим наш компонент.</p> <p>Нам больше не нужен <code>src/components/HelloWorld.vue</code> и <code>tests/unit/example.spec.js</code> поэтому удалим их.</p> <h2 id="создаём-компонент-greeting"><a href="#создаём-компонент-greeting" class="header-anchor">#</a> Создаём компонент <code>Greeting</code></h2> <p>Создадим <code>Greeting.vue</code> в <code>src/components</code>. Внутри <code>Greeting.vue</code>, добавим следующее:</p> <div class="language-vue extra-class"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
    {{ greeting }}
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
<span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
  name<span class="token punctuation">:</span> <span class="token string">&quot;Greeting&quot;</span><span class="token punctuation">,</span>

  <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token punctuation">{</span>
      greeting<span class="token punctuation">:</span> <span class="token string">&quot;Vue и TDD&quot;</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre></div><h2 id="написание-теста"><a href="#написание-теста" class="header-anchor">#</a> Написание теста</h2> <p><code>Greeting</code> делает только одну вещь – выводит значение <code>greeting</code>. Стратегия будет такая:</p> <ol><li>отрисовываем компонент через <code>mount</code></li> <li>проверяем, что <code>component</code> содержит в себе значение &quot;Vue и TDD&quot;</li></ol> <p>Создадим <code>Greeting.spec.js</code> внутри <code>tests/unit</code>. Затем импортируем <code>Greeting.vue</code> и <code>mount</code>, добавим разметку для теста:</p> <div class="language-js extra-class"><pre class="language-js"><code><span class="token keyword">import</span> <span class="token punctuation">{</span> mount <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'@vue/test-utils'</span>
<span class="token keyword">import</span> Greeting <span class="token keyword">from</span> <span class="token string">'@/components/Greeting.vue'</span>

<span class="token function">describe</span><span class="token punctuation">(</span><span class="token string">'Greeting.vue'</span><span class="token punctuation">,</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
  <span class="token function">it</span><span class="token punctuation">(</span><span class="token string">'отрисовывает приветствие'</span><span class="token punctuation">,</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>

  <span class="token punctuation">}</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
</code></pre></div><p>Существует несколько различных синтаксисов, используемых при TDD. Мы будем использовать <code>describe</code> и <code>it</code> – синтаксис, который используется в Jest. В <code>describe</code> обычно пишут что именно тестируют, в нашем случае <code>Greeting.vue</code>. В <code>it</code> содержится функция, которая проверяет конкретную часть кода. Для каждой функции компонента, мы добавляем свой блок с <code>it</code>.</p> <p>Теперь нам нужно отрисовать компонент с помощью <code>mount</code>. Обычно компонент присваивают какой-либо переменной, которую называют <code>wrapper</code>. Выведем содержимое компонента, убедимся, что всё запускается правильно.</p> <div class="language-js extra-class"><pre class="language-js"><code><span class="token keyword">const</span> wrapper <span class="token operator">=</span> <span class="token function">mount</span><span class="token punctuation">(</span>Greeting<span class="token punctuation">)</span>

console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>wrapper<span class="token punctuation">.</span><span class="token function">html</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
</code></pre></div><h2 id="запускаем-тест"><a href="#запускаем-тест" class="header-anchor">#</a> Запускаем тест</h2> <p>Запустим тест, написав в консоли <code>yarn test:unit</code>. Все файлы из папки <code>tests</code> c расширением <code>.spec.js</code> автоматически выполнятся. Если всё сделано правильно, вы увидите:</p> <div class="language-bash extra-class"><pre class="language-bash"><code>PASS  tests/unit/Greeting.spec.js
Greeting.vue
  ✓ отрисовывает приветствие <span class="token punctuation">(</span>27ms<span class="token punctuation">)</span>

console.log tests/unit/Greeting.spec.js:7
  <span class="token operator">&lt;</span>div<span class="token operator">&gt;</span>
    Vue и TDD
  <span class="token operator">&lt;</span>/div<span class="token operator">&gt;</span>
</code></pre></div><p>Как мы видим, разметка компонента правильная, тест прошёл проверку. Правда, такой тест никогда не упадёт, поэтому он не очень полезный. Даже если мы удалим <code>greeting</code> из <code>Greeting.vue</code> – тест всё равно пройдёт. Давайте исправим это.</p> <h2 id="добавnение-проверки"><a href="#добавnение-проверки" class="header-anchor">#</a> Добавление проверки</h2> <p>Нам нужно сделать проверку, чтобы быть уверенными в том, что компонент ведёт себя так, как нужно. Мы можем сделать это через Jest's <code>expect</code> API. Оно выглядит так: <code>expect(текущий результат).to [матчер] (ожидаемый результат)</code></p> <p><em>Матчер</em> – это функция, которая сравнивает значения. Например:</p> <div class="language-js extra-class"><pre class="language-js"><code><span class="token function">expect</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">toBe</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">)</span>
</code></pre></div><p>Полный список матчеров можно посмотреть в <a href="https://jestjs.io/docs/ru/expect" target="_blank" rel="noopener noreferrer">документации Jest<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a>. Во <code>vue-test-utils</code> нет матчеров, но нам достаточно тех, что предоставляет Jest. Нам нужно сравнить текст в <code>Greeting</code>. Мы можем написать:</p> <div class="language-js extra-class"><pre class="language-js"><code><span class="token function">expect</span><span class="token punctuation">(</span>wrapper<span class="token punctuation">.</span><span class="token function">html</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">includes</span><span class="token punctuation">(</span><span class="token string">&quot;Vue и TDD&quot;</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">toBe</span><span class="token punctuation">(</span><span class="token boolean">true</span><span class="token punctuation">)</span>
</code></pre></div><p>но <code>vue-test-utils</code> предоставляет ещё лучший способ – <code>wrapper.text</code>. Давайте допишем наш тест:</p> <div class="language-js extra-class"><pre class="language-js"><code><span class="token keyword">import</span> <span class="token punctuation">{</span> mount <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'@vue/test-utils'</span>
<span class="token keyword">import</span> Greeting <span class="token keyword">from</span> <span class="token string">'@/components/Greeting.vue'</span>

<span class="token function">describe</span><span class="token punctuation">(</span><span class="token string">'Greeting.vue'</span><span class="token punctuation">,</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
  <span class="token function">it</span><span class="token punctuation">(</span><span class="token string">'отрисовывает приветствие'</span><span class="token punctuation">,</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
    <span class="token keyword">const</span> wrapper <span class="token operator">=</span> <span class="token function">mount</span><span class="token punctuation">(</span>Greeting<span class="token punctuation">)</span>

    <span class="token function">expect</span><span class="token punctuation">(</span>wrapper<span class="token punctuation">.</span><span class="token function">text</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">toMatch</span><span class="token punctuation">(</span><span class="token string">&quot;Vue и TDD&quot;</span><span class="token punctuation">)</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
</code></pre></div><p>Нам больше не нужен <code>console.log</code>, удалим его. Запустим тесты <code>yarn unit:test</code> и если всё сделано правильно, у вас должно получиться:</p> <div class="language-bash extra-class"><pre class="language-bash"><code>PASS  tests/unit/Greeting.spec.js
Greeting.vue
  ✓ отрисовывает приветствие <span class="token punctuation">(</span>15ms<span class="token punctuation">)</span>

Test Suites: <span class="token number">1</span> passed, <span class="token number">1</span> total
Tests:       <span class="token number">1</span> passed, <span class="token number">1</span> total
Snapshots:   <span class="token number">0</span> total
Time:        <span class="token number">1</span>.477s, estimated 2s
</code></pre></div><p>Выглядит отлично, но вы должны всегда видеть, что тест сначала не проходит проверку, а затем проходит, чтобы убедиться в правильности теста. В традиционном TDD, вы сначала пишите неработающие тесты, затем используете полученные ошибки при написании кода. Давайте убедимся, что всё работает правильно. Обновим <code>Greeting.vue</code>:</p> <div class="language-vue extra-class"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
    {{ greeting }}
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
<span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
  name<span class="token punctuation">:</span> <span class="token string">&quot;Greeting&quot;</span><span class="token punctuation">,</span>

  <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token punctuation">{</span>
      greeting<span class="token punctuation">:</span> <span class="token string">&quot;Vue без TDD&quot;</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre></div><p>Запустим тесты через <code>yarn test:unit</code>:</p> <div class="language-bash extra-class"><pre class="language-bash"><code>FAIL  tests/unit/Greeting.spec.js
Greeting.vue
  ✕ отрисовывает приветствие <span class="token punctuation">(</span>24ms<span class="token punctuation">)</span>

● Greeting.vue › отрисовывает приветствие

  expect<span class="token punctuation">(</span>received<span class="token punctuation">)</span>.toMatch<span class="token punctuation">(</span>expected<span class="token punctuation">)</span>

  Expected value to match:
    <span class="token string">&quot;Vue и TDD&quot;</span>
  Received:
    <span class="token string">&quot;Vue без TDD&quot;</span>

     <span class="token number">6</span> <span class="token operator">|</span>     const wrapper <span class="token operator">=</span> mount<span class="token punctuation">(</span>Greeting<span class="token punctuation">)</span>
     <span class="token number">7</span> <span class="token operator">|</span>
  <span class="token operator">&gt;</span>  <span class="token number">8</span> <span class="token operator">|</span>     expect<span class="token punctuation">(</span>wrapper.text<span class="token punctuation">(</span><span class="token punctuation">))</span>.toMatch<span class="token punctuation">(</span><span class="token string">&quot;Vue и TDD&quot;</span><span class="token punctuation">)</span>
       <span class="token operator">|</span>                            ^
     <span class="token number">9</span> <span class="token operator">|</span>   <span class="token punctuation">}</span><span class="token punctuation">)</span>
    <span class="token number">10</span> <span class="token operator">|</span> <span class="token punctuation">}</span><span class="token punctuation">)</span>
    <span class="token number">11</span> <span class="token operator">|</span>

    at Object.<span class="token operator">&lt;</span>anonymous<span class="token operator">&gt;</span> <span class="token punctuation">(</span>tests/unit/Greeting.spec.js:8:28<span class="token punctuation">)</span>
</code></pre></div><p>Jest даёт нам хороший фидбек. Мы видим ожидаемый и полученный результат, а также строку, в которой произошла ошибка. Тест не прошёл проверку, как и ожидалось. Вернём прежнее значение в <code>Greeting.vue</code> и убедимся, что тест снова проходит проверку.</p> <p>В следующих блоках мы рассмотрим два метода отрисовки, которые предоставляет <code>vue-test-utils</code> – это <code>mount</code> и <code>shallowMount</code>.</p></div> <footer class="page-edit"><div class="edit-link"><a href="https://github.com/lmiller1990/vue-testing-handbook/edit/master/ru/setting-up-for-tdd.md" target="_blank" rel="noopener noreferrer">Редактировать эту страницу на GitHub</a> <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></div> <div class="last-updated"><span class="prefix">Последнее обновление:</span> <span class="time">15.09.2020, 02:44:15</span></div></footer> <div class="page-nav"><p class="inner"><span class="prev">
      ←
      <a href="/vue-testing-handbook/ru/" class="prev router-link-active">Введение</a></span> <span class="next"><a href="/vue-testing-handbook/ru/rendering-a-component.html">Отрисовка компонентов</a>
      →
    </span></p></div> </main></div><div class="global-ui"></div></div>
    <script src="/vue-testing-handbook/assets/js/app.14051834.js" defer></script><script src="/vue-testing-handbook/assets/js/3.119a321e.js" defer></script><script src="/vue-testing-handbook/assets/js/2.94957ecd.js" defer></script><script src="/vue-testing-handbook/assets/js/63.e1723f7e.js" defer></script>
  </body>
</html>
